1. Emeritus Professor, Dept. of Civil Engineering, Univ. of Calgary, 2500 University Dr. NW, Calgary, AB T2N 1N4, Canada.
2. Senior Structural Engineer, ThyssenKrupp Industrial Solutions Canada Inc., 986 Tuscany Dr. NW, Calgary, AB T3L 2T4, Canada (corresponding author).
3. Manager of Bridges and Structures, City of Calgary Transportation Infrastructure, 800 Macleod Trail SE, P.O. Box 2100, Stn. M, Calgary, AB T2P 2M5, Canada.